I suggest you ...

Eliminate the new Outlook app for iOS to sync an Outlook email account into the iPhone

The Outlook email account can no longer sync the email, contacts, calendars, and reminders into the iPhone iOS. iPhone's default Mail program cannot sync with Outlook email. A notification email was received: "You're trying to use an older way of accessing your Outlook.com email on your iPhone. If you'd prefer to use another mail app on your iPhone, click here and you will get your mail on this device. Otherwise, your mail will only sync with the Outlook app for iOS." BIG PROBLEM!! I can't access my contact from my Outlook.com on the iPhone. The only way to access is through the stupid Outlook app. How can I text a person listed on my Outlook.com account?? You simply can't! Leave Outlook.com alone and allow it to sync through Apple's default Mail program. PLEASE!!